781
FNCA52 TJSJ 221930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST FRI MAY 22 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-230800-
SOUTHEAST COASTAL PLAINS-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20 40
TEMP (24H TREND) 72 (-2) 90 (+3) 72 89
RH % (24H TREND) 91 (+5) 50 (-6) 90 50
WIND 20FT/EARLY(MPH) E 13 E 17 E 13 E 17
WIND 20FT/LATE(MPH) NE 12 E 18 NE 11 E 17
MIXING HGT(FT-AGL/MSL) 4840 4510
TRANSPORT WND (MPH) E 16 E 18
VENT RATE (KT-FT) 67760 72160
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-230800-
SOUTHERN HILLS-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 10 40
TEMP (24H TREND) 69 (-2) 86 (+4) 68 85
RH % (24H TREND) 97 (+4) 60 (-9) 97 61
WIND 20FT/EARLY(MPH) E 13 E 13 E 12 E 13
WIND 20FT/LATE(MPH) E 13 E 13 E 11 E 13
MIXING HGT(FT-AGL/MSL) 5260 4660
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 68380 69900
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-230800-
NORTH COASTAL PLAINS-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 20 50
TEMP (24H TREND) 72 (-2) 88 (+1) 72 87
RH % (24H TREND) 98 (+5) 60 (-6) 96 62
WIND 20FT/EARLY(MPH) E 16 E 17 E 18 E 17
WIND 20FT/LATE(MPH) E 14 E 18 E 14 E 18
MIXING HGT(FT-AGL/MSL) 4030 3760
TRANSPORT WND (MPH) E 17 E 20
VENT RATE (KT-FT) 60450 63920
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-230800-
NORTHERN HILLS-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10 40
TEMP (24H TREND) 69 (-2) 87 (+1) 69 86
RH % (24H TREND) 98 (+3) 64 (-3) 97 64
WIND 20FT/EARLY(MPH) E 12 E 16 E 16 E 16
WIND 20FT/LATE(MPH) E 11 E 17 E 11 E 17
MIXING HGT(FT-AGL/MSL) 4700 4130
TRANSPORT WND (MPH) E 14 E 15
VENT RATE (KT-FT) 56400 53690
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-230800-
WEST COAST-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 60 10 50
TEMP (24H TREND) 72 (-1) 89 (0) 72 89
RH % (24H TREND) 96 (+5) 62 (-4) 94 61
WIND 20FT/EARLY(MPH) E 12 E 13 E 14 E 14
WIND 20FT/LATE(MPH) E 11 E 14 E 12 E 14
MIXING HGT(FT-AGL/MSL) 4740 4180
TRANSPORT WND (MPH) E 10 E 13
VENT RATE (KT-FT) 42660 45980
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-230800-
EASTERN INTERIOR-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 20 50
TEMP (24H TREND) 70 (-2) 87 (+2) 69 86
RH % (24H TREND) 98 (+3) 61 (-6) 97 62
WIND 20FT/EARLY(MPH) E 14 E 16 E 13 E 16
WIND 20FT/LATE(MPH) E 16 E 14 E 13 E 14
MIXING HGT(FT-AGL/MSL) 4550 3690
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 63700 55350
DISPERSION 5 5
DSI 4 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-230800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 30 50
TEMP (24H TREND) 68 (-3) 83 (+3) 68 83
RH % (24H TREND) 100 (+3) 66 (-8) 99 65
WIND 20FT/EARLY(MPH) E 11 E 13 E 10 E 13
WIND 20FT/LATE(MPH) E 12 E 12 E 10 E 13
MIXING HGT(FT-AGL/MSL) 3540 2820
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 56640 47940
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-230800-
CENTRAL MOUNTAIN RANGE-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 50 10 50
TEMP (24H TREND) 66 (-3) 85 (+5) 66 84
RH % (24H TREND) 98 (+4) 65 (-8) 98 66
WIND 20FT/EARLY(MPH) E 9 E 10 E 11 E 10
WIND 20FT/LATE(MPH) E 9 E 11 E 10 E 10
MIXING HGT(FT-AGL/MSL) 5520 4710
TRANSPORT WND (MPH) E 12 E 13
VENT RATE (KT-FT) 55200 51810
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-230800-
CAYEY MOUNTAIN RANGE-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 20 50
TEMP (24H TREND) 69 (-1) 83 (+3) 68 82
RH % (24H TREND) 100 (+2) 66 (-6) 99 67
WIND 20FT/EARLY(MPH) E 10 E 11 E 10 E 12
WIND 20FT/LATE(MPH) E 11 E 11 E 9 E 12
MIXING HGT(FT-AGL/MSL) 4090 3280
TRANSPORT WND (MPH) E 17 E 20
VENT RATE (KT-FT) 61350 55760
DISPERSION 5 5
DSI 5 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-230800-
VIEQUES-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 30 50
TEMP (24H TREND) 77 (+1) 89 (+2) 77 89
RH % (24H TREND) 84 (-6) 57 (-6) 85 56
WIND 20FT/EARLY(MPH) E 19 E 19 E 17 E 18
WIND 20FT/LATE(MPH) E 19 E 18 E 17 E 17
MIXING HGT(FT-AGL/MSL) 3280 3250
TRANSPORT WND (MPH) E 23 E 23
VENT RATE (KT-FT) 65600 65000
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-230800-
CULEBRA-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 30 40
TEMP (24H TREND) 78 (+2) 91 (+3) 77 90
RH % (24H TREND) 86 (-4) 54 (-9) 84 55
WIND 20FT/EARLY(MPH) E 19 E 18 E 17 E 18
WIND 20FT/LATE(MPH) E 19 E 18 E 18 E 17
MIXING HGT(FT-AGL/MSL) 3310 3550
TRANSPORT WND (MPH) E 24 E 23
VENT RATE (KT-FT) 69510 71000
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-230800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10 40
TEMP (24H TREND) 73 (-2) 89 (+1) 72 90
RH % (24H TREND) 87 (+3) 52 (-3) 89 52
WIND 20FT/EARLY(MPH) E 18 E 19 E 17 E 19
WIND 20FT/LATE(MPH) E 14 E 20 E 13 E 21
MIXING HGT(FT-AGL/MSL) 5070 4810
TRANSPORT WND (MPH) E 17 E 20
VENT RATE (KT-FT) 76050 81770
DISPERSION 5 5
DSI 5 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-230800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 40 30 40
TEMP (24H TREND) 77 (+1) 87 (+2) 76 86
RH % (24H TREND) 85 (-3) 60 (-7) 85 61
WIND 20FT/EARLY(MPH) E 19 E 19 E 18 E 19
WIND 20FT/LATE(MPH) E 19 E 18 E 19 E 17
MIXING HGT(FT-AGL/MSL) 3440 3580
TRANSPORT WND (MPH) E 23 E 23
VENT RATE (KT-FT) 68800 71600
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-230800-
ST CROIX-
330 PM AST FRI MAY 22 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 30 40
TEMP (24H TREND) 76 (0) 88 (+1) 75 87
RH % (24H TREND) 88 (0) 61 (-3) 87 62
WIND 20FT/EARLY(MPH) E 19 E 18 E 18 E 18
WIND 20FT/LATE(MPH) E 19 E 17 E 18 E 17
MIXING HGT(FT-AGL/MSL) 4090 3730
TRANSPORT WND (MPH) E 24 E 24
VENT RATE (KT-FT) 85890 78330
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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